/**
* Adds the contents of an existing media route selector to the builder.
*
* @param selector The media route selector whose contents are to be added.
* @return The builder instance for chaining.
*/
public Builder addSelector(MediaRouteSelector selector) {
if (selector == null) {
throw new IllegalArgumentException("selector must not be null");
}
addControlCategories(selector.getControlCategories());
return this;
}